Abstract A ball grid array (BGA) package which contains an integrated circuit die that is directly mounted to either a heat sink or a printed circuit board. In one embodiment, the package has an integrated circuit with surface pads that are coupled to a flexible circuit board. Solder balls are attached to the flexible circuit board and solder the BGA package to a printed circuit board. The flexible circuit has an opening that exposes the integrated circuit and allows the IC to be soldered to the printed circuit board by solder balls attached directly to the surface pads of the IC die. The direct attachment between the die and printed circuit board increases the number of IC output pins. The flexible circuit board and die are covered by a protective injection molded plastic housing. In a second embodiment, the integrated circuit die is flipped upside down and a surface of the die is exposed through the plastic housing. A heat sink can be attached to the exposed die surface to improve the thermal performance of the package.
An electronic package, comprising: an integrated circuit which has a first surface that has a plurality of first surface pads and an opposite second surface that has a plurality of second surface pads; a housing which extends around said integrated circuit such that said second surface of said integrated circuit is exposed, said housing having a first surface and an opposite second surface that is essentially coplanar with said exposed second surface of said integrated circuit; a tape attached to said second surface of said housing, said tape having a plurality of conductive traces that are coupled to said first surface pads of said integrated circuit, said tape further having an opening that exposes said second surface of said integrated circuit; and, a plurality of solder balls coupled to said conductive traces of said tape and said second surface pads of said exposed second surface of said integrated circuit.
Claim 2
Dependent Claim
149 words
An electronic package, comprising: an integrated circuit which has a first surface that has a plurality of first surface pads and an opposite second surface that has a plurality of second surface pads; a housing which extends around said integrated circuit such that said second surface of said integrated circuit is exposed, said housing having a first surface and an opposite second surface that is essentially coplanar with said exposed second surface of said integrated circuit; a tape attached to said second surface of said housing, said tape having a plurality of conductive traces that are coupled to said first surface pads of said integrated circuit, said tape further having an opening that exposes said second surface of said integrated circuit; and, a plurality of solder balls coupled to said conductive traces of said tape and said second surface pads of said exposed second surface of said integrated circuit.
Claim 3
Dependent Claim
18 words
The electronic package as recited in claim 1, wherein said housing is constructed from a molded plastic material.
Claim 4
Dependent Claim
21 words
The electronic package as recited in claim 1, further comprising a solder mask on said second surface of said integrated circuit.
Claim 5
Dependent Claim
26 words
The electronic package as recited in claim 1, further comprising a plurality of wires that couple said integrated circuit to said conductive traces of said tape.